A tax fight in Pittsburgh and the future of non-profit hospitals nationwide

The University of Pittsburgh Medical Center (UPMC) is one of the most powerful institutions in Pennsylvania, employing some 55,000 people at more than 20 hospitals and 400 outpatient clinics. Like many powerful organizations, UPMC has detractors. The health care system is under fire from local labor organizers who want to unionize its workforce, a competing health care system that's eyeing its customer base and, lately, the mayor of Pittsburgh, who is suing UPMC to try to force the institution to pay payroll and property taxes. UPMC is now a tax-exempt non-profit organization categorized as a charity.